Spool for winding webs of material



FIG. 1 is a perspective view of a spool for winding webs of material showing my new design;

FIG. 2 is an end view thereof; and

FIG. 3 is a lateral view thereof with a portion of the length thereof broken away for convenience of illustration. 

The ornamental design for a spool for winding webs of material, as shown. 